Re: what did you do to your motorized bicycle today?
I had a thought about my 6-1/2 HP Monarch with the 3 speed Sturmey Archer tranny as a jackshaft. It went harder than it stopped (around 55) so I put a light Cerriani fork and narrow motorcycle 18" wheel with a big disk on it. I mounted a manual go-kart caliper on it and I think I could do a stoppy with it, but the rear coaster converted to rim caliper sucks. I just realized I can do the same to mount a caliper disc on it as I did to mount the drive sprocket. It is a split magnesium drum clamping the coaster brake housing with a hole for the oiler to keep it from slipping. I can also stick a setscrew in the oil hole if necessary. Anyhow the sprocket end has a large diameter into which are screwed 3 spacers through the spokes. If I make a new drum with a large flange on both sides I can mount a disk the same way. The calipers are reasonably priced on Ebay.